The larger in size (KB), the better the sound.
Large files take a long time to download.
Smaller file size means lower sound quality.
MP3 files have very good sound quality, but require an MP3 file player:

Click on the file you want with the RIGHT mouse button.

Select "Save As...". or "Save Target As..." or "Save Link As..."

Select the directory for the file.

After the file has downloaded, find the file with Windows
Explorer or from the My Computer Desktop icon.

Double-click on the file to play it.

If you can't get MP3 files to play, you need
software that plays MP3 files. Search for mojo / winamp / musicmatch
on your favorite search engine web site (any of those should work)...